Horrible service

I have reached the end of my patience with Tracker SA. My vehicle is in for repairs and the workshop manager explained that there are certain tests that they have to perform on the electronics of the vehicle. For this to happen, all after market attachments (of which there is literally ONLY THE TRACKING UNIT), will need to be disconnected. This is makes sense to me... I phoned on Thursday 24 March at 09:22, I spoke to a gentlemen who explained that he has never heard of this before (I suppose he is an auto-electrician in his spare time), but will schedule a technician to come and have a look. He informed me that this will cost R600 for the technician to come out to disconnect, and another R600 for the reconnection. I agreed to everything. He then informed me that it will take 72 hours to happen. Today, 29 March 2022 (72 working hours later)... low and behold, NOTHING. I phoned again, spoke to another lady, and she informed me that there was nothing scheduled but she will reschedule it. I asked that this means I will have to wait another 72 hours, and she confirmed it. I told her TRACKER SA is now delaying my car being repaired. I asked to speak to a manager, and I got cut off! I phoned again, confirmed all me details again, and informed the lady on the other side that it will be quicker for me to cancel my contract, than to wait for a technician to actually arrive. The lady in the retentions department (and this is their job...) informed me that she will sort this out at call me back shortly. That was at 11h30 this morning, it's now 13h50. Lets stop wasting my time, please tell me how much it will cost to cancel my contract.

Thank you